My old school 340 upgrades and results.

Just talked to my local machine shop engine parts supplier. Not so much related to what I am putting on but what I am taking off. I figured it would be nice to have a good set of performance valve springs on the shelf and they said they can supply me with inner springs by themselves. I am going to take the inner springs in and a complete dual valve spring so they can match and replace the broken springs and we can match the spring tension. While taking it apart I think the inner springs failed due to coil bind. When trying to compress them to get the keepers off I run into coil bind before I can completely clear the keepers. To use them I will have to machine either the head or retainers or both